Effect of Molecular Weight of Macro-Iniferter on Electro-Optical Properties of Polymer Dispersed Liquid Crystal Films Prepared by Iniferter Polymerization

摘要

Polymer dispersed liquid crystal (PDLC) films were prepared by a devised method, in which photo-polymerization induced phase separation in a mixtures of a macro-iniferter, methyl acrylater, and liquid crystal. The morphology of the obtained PDLC films was examined on a polarized optical microscopy, and the effect of molecular weight of MIs on the electro-optical properties was deliberately investigated. Decreasing the molecular weight of MIs in the films led to formation of larger liquid crystal droplets and a lower V-th values. V-sat increased and the memory effect decreased because of the increased interface anchoring strength induced by the higher molecular weight of polymer matrices.